<?php
/**
 * API - Enviar mensaje multimedia
 * Fecha: 13 de enero de 2026
 */

require_once '../config/config.php';

// Verificar autenticación
requireAuthentication();

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['success' => false, 'error' => 'Método no permitido']);
    exit;
}

try {
    $input = json_decode(file_get_contents('php://input'), true);
    
    if (!$input) {
        throw new Exception('Datos no válidos');
    }
    
    // Validar campos requeridos
    if (empty($input['recipient']) || empty($input['media_url']) || empty($input['media_type'])) {
        throw new Exception('Faltan campos requeridos: recipient, media_url, media_type');
    }
    
    $recipient = $input['recipient'];
    $mediaUrl = $input['media_url'];
    $mediaType = $input['media_type']; // image, video, audio, document
    $caption = $input['caption'] ?? null;
    $filename = $input['filename'] ?? null;
    
    // Inicializar servicio de WhatsApp
    $whatsapp = new WhatsAppService();
    
    // Enviar según tipo de media
    $response = null;
    
    switch ($mediaType) {
        case 'image':
            $response = $whatsapp->sendImageMessage($recipient, $mediaUrl, $caption);
            break;
            
        case 'video':
            $response = $whatsapp->sendVideoMessage($recipient, $mediaUrl, $caption);
            break;
            
        case 'audio':
            $response = $whatsapp->sendAudioMessage($recipient, $mediaUrl);
            break;
            
        case 'document':
            $response = $whatsapp->sendDocumentMessage($recipient, $mediaUrl, $filename, $caption);
            break;
            
        default:
            throw new Exception('Tipo de media no soportado: ' . $mediaType);
    }
    
    if ($response && isset($response['messages'][0]['id'])) {
        // Guardar en base de datos
        $db = Database::getInstance();
        
        // Obtener usuario
        $user = $db->fetch(
            "SELECT id FROM users WHERE phone_number = ?",
            [$recipient]
        );
        
        if ($user) {
            $db->insert('conversations', [
                'user_id' => $user['id'],
                'message_id' => $response['messages'][0]['id'],
                'direction' => 'outgoing',
                'message_type' => $mediaType,
                'content' => $caption ?? $filename ?? '',
                'media_url' => $mediaUrl,
                'status' => 'sent',
                'created_at' => date('Y-m-d H:i:s')
            ]);
        }
        
        echo json_encode([
            'success' => true,
            'message' => 'Mensaje multimedia enviado correctamente',
            'data' => $response
        ]);
    } else {
        throw new Exception('Error al enviar mensaje: ' . json_encode($response));
    }
    
} catch (Exception $e) {
    error_log("Error en send_media_message.php: " . $e->getMessage());
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'error' => $e->getMessage()
    ]);
}
?>